is_control()

MAYAFLUX_API bool MayaFlux::Portal::Text::is_control ( uint32_t  codepoint )

noexcept

True if a codepoint must never be rasterized or treated as printable content.

Covers Unicode categories Cc (control), Cf (format), Cs (surrogate), and Co (private use) via utf8proc_category(). This is the one fact every Portal::Text consumer (layout, raw-string editing) shares about a codepoint; what each does in response - skip, reposition a pen, refuse an insertion - is theirs to decide.

Parameters

codepoint

Unicode codepoint to classify.

Returns

true if the codepoint must never produce a glyph.

Definition at line 9 of file TypeSetter.cpp.

{
    switch (utf8proc_category(static_cast<utf8proc_int32_t>(codepoint))) {
    case UTF8PROC_CATEGORY_CC:
    case UTF8PROC_CATEGORY_CF:
    case UTF8PROC_CATEGORY_CS:
    case UTF8PROC_CATEGORY_CO:
        return true;
    default:
        return false;
    }
}

Referenced by insert_codepoint(), and lay_out().

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